Time-controlled mechanism.



M. 1., MATTHEWS. TIME CONTROLLED MECHANISM, APPLICATION FILED MAR. 12.1917.

Patented Sept, 18, 1917.

mwym n TIME-CONTROLLED MECHANISM.

Specification of Letters Patent.

rarest-ea se is, isiv.

Application filed March 12, 1917. Serial No. 154,203.

I! '0 all whom it may concern:

Be it known that I, MILTON J. MA'rtrrinws, a citizen of the UnitedStates, residing at Detroit, in the county of Wayne and State ofMichigan, have invented new and useful Improvements in Time-ControlledMechanism, of which the following is a specification.

My present invention pertains to timecontrolled mechanism; and itconsists in the peculiar and advantageous mechanism, hereinafterdescribed and claimed, constructed with a view to bringing about at apredetermined time the supply of fuel to a furnace, the shaking of thegrate of the furnace, the opening of the bottom draft door, and theclosing of the check-draft door.

In the accompanying drawings, which are hereby made a part hereof:

Figure 1 is a view diagrammatic in character and illustrating thearrangement of my novel mechanism relative to a furnace.

Fig. 2 is an enlarged elevation, taken at right angles to Fig. 1 andshowing the main shaft of the mechanism and its appurtenances togetherwith an alarm clock or other suitable clock and the connectionintermediate the same and the main shaft for releasing the latter at apredetermined time.

Fig. 3 is a detail section showing the arrangement of the pawl-leverrelative to the ratchet disk on the main shaft.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings.

The furnace 1, illustrated in Fig. l, is shown as equipped with a coalchute 2, normally closed at its outer end by a door 3, and provided witha verticallyanovable cutoff door f, the latter being located adjacent tothe lower end of the chute that communicates with the fire box of thefurnace. The furnace is also shown as provided with the conventionaldraft door 5, lever 6 adapted when oscillated toward and away from thefurnace casing to actuate grate (not shown), and a check-draft door '7.lVhile these elements 5, 6 and 7 are preferably of conventional type, Ido not desire to be understood as confining myself to the same,

' it being within the scope of my invention to employ correspondingelements of any descr1pt1on compatible with the purpose of my inventlon,and to transmit motlon from the oscillatory lever 6 to a grate toactuate the latter, in any approved manner.

Arranged in fixed relation to the furnace and spaced from the frontthereof is a frame embodying two standards 9 and a clocksaddle 1'6, andjournaled in the said standards 9 is the main shaft 8 of my novelmechanism; said shaft having one of its ends of angular formation, asshown, for the application of a key (not shown) through the medium ofwhich the shaft is raise the weight or wind the spring employed tooperate the mechanism, a weight being preferably employed for thepurpose, and it being deemed unnecessary to illustrate a spring which isrecognized as a full mechanical equivalent of a weight. At 10 the shaft8 is provided with a pulley, and at 11 with a crank, the latter beingconnected through a pitman, Fig. 1, with the grate actuating lever 6.will also be noted by reference to Fig. 9; that the shaft 8 is providedwith a ratchetdisl-I 1.3, and an aperture 12, the latter being for theconnection of a certain cable 26, and the portion of the shaft adjacentto the aperture 12 being circumferentially grooved as shown tofacilitate the winding of the said cable.

The clock-saddle 16 is provided with a stop 23, and the clock which isshown as secured .in the said saddle and which may be of the alarm typeor any other type that is provided with an arbor adapted to be rotatedat a predetermined time for which the clock is set, is provided on thesaid arbor with a disk 18, fixed to the arbor and provided with aplurality of apertures 19. in one of the said apertures is removablyarranged the angularly-(ilisposed upper end of a link 20, the lower endof which is connected toone arm of a vertically-swinging lever 21,mounted on the saddle 16. lhe other arm of the said lever 21 isconnected through a rod 22 with a pawl lever 1 1 mounted on one of thestandards 9 and normally held by a retractile spring 15 in yieldingengagement with the ratchet disk 13.

Connected to and designed to be wound on the pulley 1.0 is a cable 24that is passed over overhead sheaves as shown in Fig. 1 and carries aweight 25. The cable 26, hereinbefore referred to, is likewise carriedover overhead sheaves, and its end remote from the shaft 8 is connectedto the cut-off door turned to I 4. A third cable 28 is passed overoverhead sheaves and is connected at its ends to the draft door 5 andthe check-draft door 7. This latter cable 28 is connected through ashort cable 27 with theca-ble 26'.

In the practical use of my improved mechanism, the clock is wound andset for the predetermined time at which it is desired to have themechanism operate, and

. nected to the disk 18 so as to establish connection between the saiddisk and the pawllever 14; which normally engages the ratchet disk 13and thereby prevents casual rotation of the main shaft 8 under thegravitation of the weight.

With the mechanism set as described in the foregoing, it will bemanifest that at the time for which the mechanism is set, the disk 18will be rotated and through the link 20 will raise one arm of the leverdoor 7 will be permitted to gravitate to a closed position. Also byreason of the r0- tation of the shaft 8, the g ate lever 6 will beoscillated and the grate (not shown actuated. Thus without the presenceof an attendant, the furnace will be made to raise the temperature ofthe air in a dwelling or other building, at a time when it is desiredfor the dwelling or other building to be- .come warmer, as in themorning.

.7 in order to impart a full, clear and exact understanding of the saidembodiment. I do not desire, however, to be understood as confiningmyself to the said specific construction and relative arrangement ofparts, as in the future practice of the invention such changes ormodifications may be made as fairly fall with-in the scope of myappended claims.

Having described my invention, What I claim and desire to secure byLetters-Patout, is:

1. 111: means for the purpose described, the

combination of a gravitating draft door of a furnace, a gravitatin-gcheck-draft door also complementary to a furnace, a gravitatisng' doorfor controlling the supply of fuel; to a furnace, sheaves located in ahorizontal plane above the check-draft door, acable passed over saidsheaves and extending between and connected to the gravitating draftdoor and the gravitating check-draft door, a third sheave, a cableconnected to the fuel-controlling door arndpassedover the last-namedsheave, a branch cable con=nect.-

ing: the said cables at a point below the sheaves,wand means for takingup the cable that is passed over the last-n-amed sheave- 2. In means forthe purpose described, the

combination of a grate-actuating lever, sup.

porti n-gme'ans, a shaft jiournaled in the latter means and having aratchet disk, a crank on said shaft, a pitinarr intermediate said CRIB;and the grate-actuating lever, means connected witlrthe shaft forrotatingt'he samewhen it is released, a pawl lever mounted onthesupporting means and yieldingly maintained in engagement with theratchet dish, a clock mounted on the supporting means and having a diskadapted to be revolved at a predetermined time and also having aperturesin said disk off the center thereof, a vertically-swinging lever on thesupporting means, a connection between one arm of said lever and thepawl lever, and a link connected to the other arm 'of thevertically'swinging lever and. having an angularly disposed end portionadapted for removable arrangement in one of the apertures of the disk.

- In testimony whereof I have hereunto set my hand in presence of twosubscribing wit:-

nesses.

MILTON J. MATTHEWS. Witnesses: V

ROBERTA Brown, Norman J. RICE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner o'fPatents. Washington, 1L0.

